In the present study, we investigate flow past a rotating cylinder over a wide range of flow rarefaction from the early slip through to the free-molecular regime using the direct simulation Monte Carlo method. We focus specifically on high-speed flow conditions and consider a wide range of Mach numbers near the high subsonic, transonic, and supersonic regimes. Various flow parameters such as the coefficients of lift and drag as well as the coefficients of pressure, skin friction, and wall heat transfer have been investigated as a function of both the Mach number and the Knudsen number to gain insight into the flow physics in the different regimes. The flow characteristics in the transonic regime have been found to be substantially different from those in the supersonic regime. In particular, an inverse Magnus effect involving a change in the direction of the lift force occurs in the supersonic regime. In contrast, subsonic flows in the early slip-flow regime experience the conventional direction for the Magnus lift force. This paper demonstrates that there is a subtle interplay between the Mach number and Knudsen number for the occurrence of the inverse Magnus effect.
High-Speed Rarefied Flow Past a Rotating Cylinder: The Inverse Magnus Effect
AIAA journal ; 54 , 5
2016
Article (Journal)
English
High-Speed Rarefied Flow Past a Rotating Cylinder: The Inverse Magnus Effect
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